Powder composition for coating
(57) Abstract:Powder composition for coating relating to paints, varnishes and lacquers, designed to produce protective and decorative coatings on nonmetallic substrates in construction and in everyday life, for internal painting of buildings and structures of brick, concrete, plaster, wood and other porous surfaces. Powder composition includes a binder is a complex polyester obtained on the basis of dichlorohydrin isophthalic acid and Laprol taken in the ratio of 1.0: 1.0 to 1.0 to: 1,2 (in equivalents), titanium dioxide, silicon dioxide, dolomite, sodium polyphosphate, OP-7, polyvinyl alcohol, gramos 402 and p ester of stearic acid. The combination of components in a certain ratio, we can get frost-resistant powder coating with satisfactory adhesion and hardness. table 2. The invention relates to paint compositions, in particular to powder redispersible compositions, intended for the production of protective and decorative coatings on nonmetallic substrates, as well as for internal painting of buildings and structures of brick, concrete, plaster, wood and other porous surfaces.Known closest to the technical essence and selected for the prototype powder paint containing as a binder a polyester resin, with the following content, wt.% [CCCP, ed. the certificate in 734238, CL 09 D 5/03, 1980]:
Saturated polyester resin - 60-80
Thermosetting acrylic copolymer of 0.4 to 6.0
Hardener - 3-10
Surfactant - 0,2-3,0
Pigments and fillers - Rest
However, this paint has a number of disadvantages:
- a relatively high temperature (about 200o(C) for the formation of coatings;
- you specialo affects the environment in the shop and adversely affects the health of workers.Also paint a similar nature has no ability to redispersion, which excludes the possibility of its use as a dry mixture in construction.The objective of the invention is to provide a dry paint capable of redispersion in water immediately prior to use (i.e., redispersible powder coating), coating on the basis of which can be formed at low temperatures (<15C). The term "redispersion" emphasizes special and important property of the synthetic resin: the ability of the dried dispersion re dispergirujutsja in water.In this case:
- there is no need to transport water transport and storage is cheaper);
- simple and cheaper packaging - paper bags (simplified disposal containers);
- storage and transport is possible even in extremely adverse climatic conditions (e.g. frost) without compromising the quality of the paint;
- easy preparation of paint on site by mixing the dry mixture in water (paint preparation necessary for the number);
- does not require special equipment to spray - paint is applied on the surface is s for various construction works, for example, for walls and ceilings of buildings in brick, concrete, plaster, wood and other porous surfaces [Lutz, Powder polymers for modification of dry building paints. Coatings and their applications, 1997, 2, S. 26-27].The task of the invention is achieved in that a powder composition for coating contains a binder, which is a complex polyester obtained on the basis of dichlorohydrin isophthalic acid and Laprol taken in the ratio (in equivalents) 1,0:1,0-1,0:1,2 (Laprol - simple oligoesters obtained by anionic polymerization of propylene oxide); as pigment contains titanium dioxide; fillers - silica and dolomite (CaCO3MgCO3); as surfactants - sodium polyphosphate (dispersant), OD-7 (trademark of the manufacturer; is polyoxyethylene ether of alkylphenol) (emulsifier, wetting agent), polyvinyl alcohol (stabilizer), gramos 402 (trademark of the manufacturer; is a copolymer of butyl acrylate, methacrylic acid, with glycidylmethacrylate) (thickener), p ester of stearic acid (stabilizer) in the following ratio of components (wt.%):R>Polyphosphate sodium - 0,25-1,5
OP-7 - 0,5-2,5
Polyvinyl alcohol - 0,15-1,0
Gramos 402 - 1,0-2,5
P ester of stearic acid - 0,1-1,0
Polyester synthesized as follows: in chetyrehosnuju flask equipped with a thermometer, a tube for supplying inert gas and reflux condenser, was placed Laprol. Dichlorohydrin isophthalic acid are dissolved in toluene and the resulting solution was poured to the contents of the reaction vessel. Include a stirrer and lead synthesis at a temperature of 100oTo the degree of completion of reaction ~ 80-90%, which is appreciated by the quantity of evolved hydrogen chloride. Evolved hydrogen chloride catch, either in the absorption vessel with an aqueous solution of alkali, taken in a threefold excess in relation to theoretical amount released during the reaction Hcl or acceptors, such as tributylamine introduced directly into the reaction mass. The resulting solution in toluene, neutralized and washed repeatedly with water, then distilled water-toluene mixture. Characteristics of the binder are shown in table 1.As Laprol can be used, for example, Laprol brands B, 373, 1052, and others.Preparation of dry paint and the compensation of the oligomer check on the content of the basic substance (dry residue) and diluted if necessary, up to 30% concentration.In disolver load (wt.%):
A binder is a complex polyester obtained on the basis of dichlorohydrin isophthalic acid and lapola brand B - 15
Titanium dioxide - 20
Silicon dioxide - 10
Dolomite - 53
Polyphosphate sodium - 0,25
OP-7 - 0,5
Polyvinyl alcohol - 0,15
Gramos 402 - 1,0
P ester of stearic acid and 0.1
The dispersion is carried out to achieve the degree of dispersion of 38 to 40 μm, which is controlled by the method of the wedge. After dispersion, the solvent is removed from the resulting product is subjected to the dry mixture to grinding.The resulting powder is the required form of the "dry" paint.Getting ready to use paint material is carried out by adding water to the powder in the ratio of powder:water 1:1-3:4 (by weight) and thorough mixing during the first 60 s, and then after a ten-minute break for another 5 minutes.The material was applied (by brush, roller, spray gun) on glass, wood, concrete and plastered surfaces. After curing of the coating was evaluated by appearance, adhesion, slavemaster,
Examples 2-6 analogous to example 1. The results tested the ditch, the coatings obtained on the basis of the proposed compositions have satisfactory adhesion and hardness compared to the compositions obtained by the prototype.Powder form of "dry" paint gives the opportunity to prepare that amount, what is required at the moment. In addition, this paint is very practical due to the fact that in powder form, it does not freeze and frost doesn't affect the quality of the paint. In dry form it does not deteriorate and immediately ready to use after mixing with water. Also the paint does not pollute the environment because it does not contain any preservatives and toxic solvents.In addition to the positive qualities of the paints listed above, it is necessary to mention its practical packaging (paper bags), because the water is added just before use, which is very convenient and advantageous when transporting. Powder composition for coating comprising a binder, a pigment, a filler, characterized in that it contains as a binder a complex polyester obtained on the basis of dichlorohydrin isophthalic acid and Laprol taken in the ratio in equivalents 1,0:1,0 - 1,0:1,2, as Pigma sodium, OP-7, polyvinyl alcohol, gramos 402, p ester of stearic acid in the following ratio, wt.%:
Complex polyester - 15-25
Titanium dioxide - 15-20
Silicon dioxide - 6,5-10
Dolomite - 45-53
Polyphosphate sodium - 0,25-1,5
OP-7 - 0,5-2,5
Polyvinyl alcohol - 0,15-1,0
Gramos 402 - 1,0-2,5
P ester of stearic acid is 0.1 to 1.0
FIELD: thermosetting coating materials.
SUBSTANCE: claimed material contains polyester with carboxylic functional group and/or polyacrylate with carboxylic functional group, β-hydroxyalkylamide in which part of hydroxyls are chemically blocked, and/or fillers, and/or heat setting agent, and/or triboadditives, and/or additives such as flow controlling agent and degasification agent.
EFFECT: material of improved degasification and flow characteristics.
6 cl, 1 tbl, 3 ex
FIELD: composite materials.
SUBSTANCE: invention relates to a method for preparing compositional tribotechnical material that could be used in mechanical engineering for manufacturing tribotechnical articles and coatings for friction units of various-functional destination machines and mechanisms. Material contains 0.01-5.9% ultrafine modifier, 0.1-1.0 functional additive, and, as the rest, polyamide 6/polyamide 11 mixture. Ultrafine modifier utilized are fine particles of naturally occurring silicate-containing minerals with particle size not larger than 100 nm.
EFFECT: improved adhesive, physico-mechanical and tribotechnical characteristics.
2 cl, 2 tbl
FIELD: production of compositions from powder materials for forming coats of faint luster.
SUBSTANCE: composition is made by adding 5 to 60 weight-% of spheroidal particles to at least one resin selected from group consisting of thermosetting resins and thermoplastic resins. Average diameter of spheroidal particles is more than 10 mcm; maximum diameter of particles is about 50 mcm. Spheroidal particles are selected from group consisting of glass, ceramic or metal particles and minerals.
EFFECT: reduction of spreadability of coat; avoidance of "orange peel" on coat.
7 cl, 8 tbl, 19 ex
FIELD: organic chemistry, chemical technology.
SUBSTANCE: invention relates to derivative of α-hydroxyester and to a method for its preparing, to a method for preparing α-halohydrin intermediate compound and to a method for preparing epoxy resin from it, and to composition based on epoxy resin. Epoxy resin represents compound of the general formula: (R2)yAr(OR1'')z wherein y means values from 0 to 750; z means values from 1 to 250; Ar represents fragment comprising aromatic compounds; R1'' represents fragment comprising glycidyl; R2 represents chlorine, bromine, iodine, fluorine atom, alkyl group, cycloaliphatic group or aromatic group substituting hydrogen atom in fragment Ar. Method for preparing epoxy resin involves three stages. At the first stage method involves preparing α-hydroxyester of one or more phenols by interaction at least one or more phenols with glycidyl ester or substituted glycidyl ester. Derivative of α-hydroxyester corresponds to the formula: (R2)yAr(OR1')z wherein y, z, Ar and R2 have above given values; R1' represents fragment comprising propyl α-hydroxyester. At the second stage method involves preparing α-halohydrin intermediate compound of at least one or more phenols by interaction of derivative of α-hydroxyester, at least one or more phenols with halide hydrogen. α-Halohydrin intermediate compound has the formula: (R2)yAr(OR1')z wherein y, z, Ar and R2 have above given values, and R1' represents fragment comprising α-halohydrinpropyl. At the third stage method involves carrying out the epoxidation reaction of abovementioned α-halohydrin intermediate compound of at least one or more phenols. Composition for powder cover comprises at least two or more components wherein at least one component represents epoxy resin. Invention provides preparing epoxy resin in the absence of epichlorohydrin by using above given stages.
EFFECT: improved preparing method.
75 cl, 4 tbl, 2 ex
FIELD: powder covers.
SUBSTANCE: invention relates to a powder cover composition and to a method for its preparing that forms cover with reduced luster after hardening. Composition comprises one or some cross-linked basic polymers: cross-linked polyester, cross-linked polyurethane, cross-linked acrylated polyether and their combinations, about from 5 to 60 wt.-%; cross-linked acrylic polymer with solidification point about from 40°C to 100°C, and about 0.1 to 10 wt.-% of one or some free-radical initiating agents. Additional reducing luster and improved smoothness can be obtained by addition spheroidal particles to the powder cover composition. Proposed compositions can be used for making covers on metallic backings, such as vehicle bodies and on nonmetallic backings, such as backings made of pressed wood materials with impregnation used for making table tops of different species.
EFFECT: improved and valuable properties of covers.
21 cl, 4 tbl
FIELD: ultraviolet-hardened powder compositions based on oligoether(meth)acrylates, possible use for producing lacquer covers on both non heat-resistant (wood, plastic, assembled structures) and metallic substrates, which are used in production of furniture, construction, mechanical engineering and other industrial branches.
SUBSTANCE: ultraviolet-hardened powder composition for lacquer covers is described, including film-forming agent component in form of two-component system of oligoether(meth)acrylate and second non-saturated compound with molecular mass equal to 500-970 g/grammolecule, produced by synthesis from p-hydroxyethoxystyrene and diisocyanate, selected from a row: 1,6-hexamethylenediisocyanate, 2,4-toluyelenediisocyanate, isophoronediisocyanate, 4,4'-methylene-(biscyclohexyldiisocyanate) or produced by synthesis from p-hydroxyethoxystyrene, diisocyanate, selected from a row: 1,6-hexamethylenediisocyanate, isophoronediisocyanate, 4,4'-methylene-(biscyclohexyldiisocyanate) and multi-atomic spirits, selected from a row: neopentylglykol, 1,6-hexanediole, while two-component system of film-creating agent contains components in accordance to ratio, appropriate for ratio of non-saturated double links of oligoether(meth)acrylate and non-saturated composition with molecular mass M=500-970 g/grammolecule, within limits from 1:1 to 1:1,2, photo-initiator of benzoyl type, filling agent and degassing agent, with stated ratio of components.
EFFECT: suggested ultraviolet-hardened powder composition allows production of lacquer covers with improved properties - increased chemical stability and high level of physical and chemical properties with preservation of decorative and protective properties.
1 cl, 2 tbl, 46 ex
FIELD: powder materials for making coats of items during protracted operation at high working temperatures.
SUBSTANCE: proposed powder material contains the following components: from 40 to 65 mass-% of at least one solid epoxy resin which is semi-functional relative to thermal cross-linking by epoxy groups at equivalent mass of epoxide from 380 to 420 g/eq and ICI viscosity of melt at 150C from 2800 to 5000 mPa·s and softening temperature from 95 to 105C (A); from 15 to 35 mass-% of at least one solid linear epoxy resin on base of bisphenol A , AD and/or F whose functionality relative to thermal cross-linking by epoxy groups is equal to 2 maximum; from 15 to 30 mass-% of inorganic filler (b) and from 1 to 10 mass-% of at least one hardener. Powder material is applied on metal bases and are thermally cross-linked or hardened.
EFFECT: enhanced parameters of elasticity, wear resistance, resistance to scratching; enhanced water prooofness and corrosion resistance of coat.
12 cl,, 2 tbl, 4 ex
FIELD: chemistry; inorganic.
SUBSTANCE: invention is related to a composition for production of insulating coatings on working surfaces of parts of machines, mechanisms and process equipment, e.g., flange joints in trunk pipelines. The composition comprises the following proportion of components, % by mass: 0.1-10.0 elastic modifier, 0.1-3.0 disperse filler, 0.1-0.5 functional additive, the balance to 100 being polyamide matrix. Disperse particles of structured elastomer in the form of ground rubber of 10-100 mcm particle sizes are used as the elastic modifier. Montmorillonite, or flint, or tripoli are used as the disperse filler. Dibutyl phthalate or dioctyl phthalate are used as the functional additive. The invention makes it possible to improve adhesive, deformation and insulating properties of the coating as well as its resistance to thermal-oxidative media.
EFFECT: improvement of properties of insulating coatings.
2 tbl, 10 ex
SUBSTANCE: powdered coating agent contains solid particles of a resin-polyurathane binding substance with equivalent mass of olefinic double bonds ranging from 200 to 2000 and content of silicon bonded in alkoxy silane groups ranging from 1 to 10 mass % and a photoinitiator. In the method of obtaining a single layered or multilayered coating on substrates, in particular when obtaining multilayered coating for transportation equipment and their components (car body or car body components coating), at least one layer of this coating is deposited from a powdered coating agent. In that case, solidification of at least one layer of the above mentioned powdered coating is achieved through free-radical polymerisation of olefinic double bonds when irradiated with high energy radiation and through formation of siloxane atomic bridges under the effect of moisture.
EFFECT: obtaining a powdered coating, which is hard, has scratch resistance and good resistance to chemical effects.
8 cl, 1 tbl
FIELD: technological processes.
SUBSTANCE: invention pertains to the technology of polymer functional materials and can be used in machine building when forming coatings for component part of machines, mechanisms and transport systems, and mainly pipes for pumping petroleum products. The method of forming composition coating from silicate polymer material involves mixing powder polymer particles and silicate particles. The mixture is then deposited on the surface of the object and heated. Polymer particles are flushed off and monocrystallisation of the coating is carried out. The powder polymer particles are chosen from a group containing polyamide, polyethyleneterphtalate, high pressure polyethylene. Silicate particles are chosen from a group containing montmorillonite, kaolin, tripolite. Heating and flushing off are done in a gas stream with density of 3·106-9·106 W/m2 for a period of 10-4-10-3 s. Depositing and monocrystallisation are done on an object, heated to temperature T=Tm+5÷40°C, where Tm is the melting temperature of the polymer, with pressure of the gas stream of 3-5 atmospheres. The coating is formed by depositing it on one or more ducts of the used device for depositing it, or is deposited by successive passage of the device with the polymer component, and then a device with the silicate component.
EFFECT: increased adhesive strength, hardness and ultimate stress limit, and design of a method which provides for high production effectiveness of the process and lower cost of the coating.
3 cl, 2 tbl